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ADAU1701 multiplier and accumulator infos

Question asked by leonxp on Aug 24, 2013
Latest reply on Aug 24, 2013 by KJBob

Hi everybody. I'd need to know how a FIR filtering works. From datasheet I read that:

  1. multiplier have 28x28 bits and I suppose 56bits output, right? Is the 56bits output also for FIR filtering?
  2. accumulator have 56bits but in full precision mode, for FIR filters is the same, since FIR filtering works in signle precision?

 

Knowing these infos I can decode the entity of round and roundoff error for FIR filtering having high taps.

I hope you can help me.

Regards, Leo.

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